The Massachusetts Horticultural Society will hold its 17th annual marketplace festival on Saturday . Featuring a full day of food sampling, shopping, and entertainment for all ages, the festival will be held at the historic Cheney Elm Bank Estate, at 900 Washington St., which is also the society’s headquarters. More than 40 New England vendors will sell their products, including plants, handmade crafts and jewelry, soaps, baked goods, teas, herbs, vegetables, garden products, clothing and fine art. Children’s activities include face painting, a moon walk, a scavenger hunt, crafts, book readings with gardening themes, and a seed planting project to take home. Visitors are also invited to picnic in the estate’s gardens, and to tour the grounds. The Massachusetts Marketplace Festival runs from 10 a.m. to 4 p.m. and costs $8 for ages 12 and up, $2 for younger children; admission is free for society members. Tickets can be purchased at the gate; there is no parking fee. Proceeds from the festival will support the society’s efforts to encourage wider appreciation of plants and the environment. For more information, visit www.masshort.org.